First, you need to take courses and at the end take the final exam to get your license. I have heard that the final exam is extremely hard to pass. I talked to many people who have taken it multiple times to pass it. I don't know if it's just hard in Texas but studying and preparing for the exam is crucial.
Second, the hardest part about being a new agent is getting paid differently. Most people are used to getting paid weekly/biweekly but as an agent, you only make what you sell.
Third, you are basically running your own business. You have to be able to market yourself and also find leads. When you first start you might learn how to do specific work and learn about the laws but you don't learn how to run your business. That's a hard skill most agents struggle with at first.
Fourth, working off-hours. Most people who are looking for new homes tend to have 9-5 jobs and are pretty busy people. So you get to meet with them on off hours, which tends to be late. This may be drowning for many agents new or experienced.
These are just a few examples I could come up with but if you are interested in getting your real estate license I totally support you. Nothing in life is easy but throughout time you will learn and become better. Hope this helped answer your question.
So happy you are considering Real Estate as a career. I've been a Realtor for over 40 years and love this industry. Nothing is better than helping people find the right home or investment property. Wealth in America can be closely tied to real estate ownership. So, what is the hardest part? Having enough financial resources so you are not stressed about your next closing. We used to inform new agents that they should have six months of reserves but depending on how you enter the business could require more of less. An example, which I recommend for new agents, is to find a team to join so you can be mentored as well as have a more secure income. If you plan to go on your own you'd need make sure you join a firm that provides ongoing education since the course work to gain a license is about the law not the practice. Good luck!
So really one of the hardest things I would have to say is the amount of competition in the industry! So you have to find ways to put yourself above the rest. And these days that can be very difficult. But it’s a service industry. You have to put people before you or a paycheck. Good luck, you can do it!